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Surface Raman and infrared spectroscopy double-enhanced detecting method based on graphene and nanogold compounding

A technology of graphene nanoribbons and infrared spectroscopy, which is applied in color/spectral characteristic measurement, nanotechnology for materials and surface science, Raman scattering, etc., can solve the problem that resonance peak modulation cannot be realized, and metal nanostructures cannot be dynamically Modulation, unable to solve problems such as enhanced bands, to achieve the effect of speeding up sample detection, realizing complete measurement, and increasing interaction

Active Publication Date: 2016-06-22
CHONGQING UNIV
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Problems solved by technology

However, the metal nanostructure itself cannot be dynamically modulated. Once the device is designed, the modulation of the resonance peak cannot be realized, making it impossible to solve the problem of narrow enhancement band.

Method used

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  • Surface Raman and infrared spectroscopy double-enhanced detecting method based on graphene and nanogold compounding
  • Surface Raman and infrared spectroscopy double-enhanced detecting method based on graphene and nanogold compounding
  • Surface Raman and infrared spectroscopy double-enhanced detecting method based on graphene and nanogold compounding

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Embodiment Construction

[0040] The present invention will be further elaborated below in conjunction with accompanying drawing:

[0041] see figure 1 , the dual enhanced detection device designed by the present invention includes: infrared light source 1, laser light source 2, beam combining mirror 3, graphene nanoribbon and nano-gold particle composite substrate 4, focusing lens 5, Fourier transform infrared spectrometer 6, focusing lens 7 and Raman spectrometer8.

[0042] The optical path relationship of the device is as follows: the infrared light emitted by the infrared light source 1 and the visible light emitted by the laser light source 2 converge at the beam combiner 3, and the composite light is obliquely incident on the composite substrate 4 of graphene nanoribbons and gold nanoparticles, and the visible light excites The localized surface plasmon resonance of gold nanoparticles 45 generates a strong localized electromagnetic field, which greatly enhances the Raman scattering signal of tra...

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Abstract

Provided is a surface Raman and infrared spectroscopy double-enhanced detecting method based on graphene and nanogold compounding.According to the method, light sources, a lens, a graphene nanobelt and gold nanoparticle composite substrate, an infrared Fourier spectrograph and a Raman spectrometer are included.Infrared light waves and visible light waves emitted by the infrared light source and the laser light source respectively pass through a beam combiner and then irradiate the graphene nanobelt and gold nanoparticle composite substrate, after the light waves and trace molecules adsorbed on the substrate interact, reflected light is gathered by the focusing lens to enter the infrared Fourier spectrograph, and meanwhile scattered light is gathered into the Raman spectrometer.Raman scattering signals of the trace molecules can be enhanced through the local area plasma effect of the gold nanoparticles, and meanwhile infrared absorption spectrum signals of the trace molecules can be dynamically enhanced through the graphene surface plasma effect within the broadband range.According to the method, double enhancement of surface Raman and broadband infrared spectroscopy signals is achieved on the same substrate, and the advantages of being wide in enhancement wave band, high in detecting sensitivity, wide in detected matter variety range, good in stability and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of surface-enhanced spectroscopy, in particular to a detection method and device for simultaneously realizing double enhancement of surface Raman spectrum and surface infrared absorption spectrum. Background technique [0002] Single-layer molecular detection technology refers to a series of high-sensitivity detection technologies with detection sensitivity reaching the molecular level, which can be applied to food safety, environmental monitoring, chemical analysis and biomedicine and other important fields related to the lifeline of the national economy. Enhanced molecular spectroscopy detection technology is a popular and key technology derived from the development of single-layer molecular detection technology in recent years. In this technology, the excitation of metal surface plasmon waves is the basic idea to enhance the interaction between light waves and molecules and amplify the characteristic abso...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N21/35B82Y30/00
CPCB82Y30/00G01N21/35G01N21/658
Inventor 韦玮农金鹏张桂稳蒋肖陈娜
Owner CHONGQING UNIV
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